Picture-projecting machine.



B. H. FOSTER.

PICTURE PROJECTING MACHINE.

APPLICATION FILED APR. 5, 1917- Patented Apr. 30,1918.

3 SHEETSSHEET 1- "gm: a a f Iya d Snow H01:

Z2 b. Foaier? B. H. FOSTER.

PICTURE PROJECTING MACHINE. I APPLICATION FILED APR. 5. 1911.

1,264,869. Patented Apr. 30, 1918.

3 SHEETS-SHEET 2.

B. H. FOSThR.

PICTURE PROJECTING MACH'I NE. APPLICATION FILED APR. 5. wall.

1,264,869. Patented Apr. 30, 1918.

3 SHEETS-SHEET 3- UNITED STATES PATENT oFFIoE.

BALDWIN n. FOSTER, or UTICA, NEW YORK, assreivon 0E ONE-HALF T0 FRED w. SIMON,

OF UTICA, NEW YORK. I

Specification of Letters Patent.

Patented Apr. 30, 1918.

Application filed April 5, 1917. Serial No. 159,946.

To all whom it may concern:

Be it known that I, BALDWIN H. FOSTER, a citizen of-the United States of America, residing at Utica, in the count of Oneidaand State of New York, have invented certain new and useful Improvements in Picture- Projecting Machines, of which the following is a speci cation.

This invention relates to picture projecting machines and has for its principal object the production of simple and eificient means for stopping a motion picture machine and cutting ofi the electric are provided the film is broken.

Another object of this invention is the production of a picture projecting machine attachment which is provided with a plunger so arranged as to bear upon the. film whereby in case the film is accidentally broken the plunger will move so as to permit a circuit closing means to operate for start-. ing a motor which will in turn throw a switch so as to stop the motion picture machine, cut off the electric arc, and at the same time stop the first-mentioned motor.

Another object of this invention is the production of an attachment for pictureprojecting machines wherein a trip arm is provided which is so arranged as to be auto matically tripped provided the film is broken so as to close the circuit for stopping the motion picture machine and cutting off the electric arc, thereby preventing fires ordinarily incurred due-to the breaking of the film.

With these and other objects in view,'this invention consists otcertain novel combinations, constructions and arrangements of parts as will be hereinafter fully described and claimed. I

In the accompanying drawings:

Figure 1 is a side elevation of the attachment for a picture projecting machine.

Fig. 2 is a central vertical section through the circuit closing mechanism.

Fig. 3 is a section taken on line 33 of Fig. 1 looking in the direction of the arrows.

Fig. 4 is a horizontal section through the housing for the circuit closing means, show- I ing the circuit closing means in top plan.

Fig. 5 is a section taken on line 55 of Fig. 2, looking in the direction of the arrows. Fig. 6 is a detail perspective view of the plunger housing.

Fig. 7 is a section taken on line 7- -7 of ing the disk used for throwing the switch in section.

Referring to the accompanying drawings by numerals it will be seen that the attachment is adapted to be mounted upon the supporting table 1 having the usual su porting stands 2. It is, of course, 0 vious that this device is intended to be used with any form of a picture projecting machine for it will readily stop the action of the machine and out 011' the are light, provided the film is accidentally broken, irrespective of the specific construction of the picture projecting machine. I I

The box 3 is mountedupon the table 1 while the reels 4 are rotatably mounted in any desired manner adjacent the ends of the box 3. The film 5 passes around the idlers 6 in passing through the box 3 from one reel to the other, as shown clearly in Fig. 2.

The housing 7 is permanently carried upon the table 1 and this housing 7 is provided with a base 8, sides 9, ends 10 and top 11. It is intended to form this housing 7 offiber or some similarsuitable material vof a non-conducting nature so as to positively prevent any short circuits when the device. is in operation. This housing 7 is carried upon the table 1 as above set forth so as to have one of its ends 10 abutting against the box 3, as shown in Figs. 1, 2 and 4.

The plunger tube 1.2 is carried upon the base 8 of the housing 7 and projects through one end of the housing 7 into the box 3, as shown clearly in Figs. 2 and 4. The plunger tube 12 is rectangular in cross section and, therefore, the plunger 13 which is reciprocally mounted within the plunger tube 12 will be positively held against rotation. This plunger 13 has L-shaped arms 1t formed upon one end thereof, upon which the roller is rotataloly mounted. This plunger 13 is normally urged in one direction since the coil spring 16 is positioned thereon and this coil spring 16 hears at one end against the plunger tuhe l2 and at its opposite end against the arrns 14. The roller 15 normally hears against the film 5 when the picture projecting machine is in operation and, therefore, the plunger 13 will he held in a set position against the tension of the coil spring 16, This plunger 13 is considerably longer than the tube 12 and has a heveled inner end as indicated at l A guide rod 18 is carried by the hose 8 and top 11 of the housing 7 and this guide rod 18 passes through the opening 19 formed in the trip arm 20. A coil spring 2i is secured at one end tothe trip arm 20 and at its opposite end to the base 8 so as to normally urge the trip arm 20 downwardly. This trip arm 20 is normally retained in an elevated set position, however, by the trip rod 22, The trip rod 22 hears at its upper end against the trip arm. 20 while the lower end of this trip rod 22 rests upon the plunger 13. If, however, the film 5 is hrolren, the tension of the spring ill will move the plunger 13 to a greater distance into the hon 3 and, therefore,\ the plunger will move out from under the trip rod 22. As soon as this action takes place, it is ohvious the trip rod 22 will fall and therefore the trip arm 29 will he without support. @wing to the weight oi the trip arm, together with the urging of the coil spring 21, the trip arm will move downwardly, losing guided by the rod 18.,

A contact point 23 is carried by this trip arrn 2i) while a contact point 24: is carried by the lease 8 or the housing 7. These contact points 23 and 24- are in alinernent with each other under normal conditions and, therefore, when the trip arm 20 moves downwardly, the contact point 23 will engage the contact point 2% and thus close circuit,

A loloclr 25 may he carried in any desired position adjacent the attachment, and a mo tor 26 is fixedly mounted upon this oloclr 25. The shaft 2'? extends from the motor 2 and has a gear 28 keyed thereto, which gear 28 meshes with the gear 29 which in turn has a shaft 30 lreyed thereon. A threefold switch 81 is also carried upon the loloch 25 and the pins 32 extending there from, The dislr 33 is lreyed upon the ssh 30 as shown at and, therefore, it wi seen that as rotary motion is imparted to the shalt 36, the disk 33 will also he rotated. transverse pin 35 is carried b the d 33 adjacent its periphery so that who dislr is rotated sufiic e y, H will he en recesses pins 32 on the switch 31, thereby swinging the switch 31 so as to break the various circuits to he hereinafter set forth.

A wire 36 is connected to the point 24 to the motor 26. A wire leads from the motor 26 and is connected to one pole of the switch 31, while a wire 38 leads from the pole of the switch just mentioned to a suitable source of supply. A return wire 39 is connected to the point 23 on the trip arm 29 and this wire 39 is provided with a hand. switch i0, This wire 39 is also intended tolce connected to the source oi supply to which the wire 38 is connected so as to form a complete circuit when the points 23 and 24: engage each other,

A motor 41 is supported in any suitable manner upon the table 1 for the purpose of operating the picture projecting machine which is to he used in connection with the present invention. The wire 42 connected to motor is in turn connected to a suitable source of supply, while the wire 4 13 is connected to the middle pole of the switch 31 as shown in Fig l and "from this middle pols there extends a wire let to he connected to the same source of supply as the wire 42 Therefore, it will be seen that when the switch 81 is in a closed position the circuit is formed so as to cause an electric current pass over wire 42 to the motor 41 for running this motor, while the current will return over wire t3, the middle pole of the switch. 31 to the wire he electric are 45 is also supported upon one the standards 2, if so desired, and the wire to extending to asource of electrical supply. A wire l passes to one of the outer poles of the switch 31 and from this outer ole last mentioned there extends a extending to the same source supply as the wire to. Therefore, when the switch is in a closed position an electric current will pass over the wire itl the electric arc to, while the current will return over the wire ll, one of the outer poles of "the switch 31 to the wire l8.

3 When this device is in operation it will .oe set up shown in Figs. 1 and 2, At this time the switch 31 will he closed so es to provide circuits for the electric arc and the motor ll, If the tlhn 5 is accidentally broken, plunger 13 will more so to permit the trip arm 20 to move so as to cause the points 23 and 24 to engage each other, as herein hot-ore set forth. The engagement of these contact points 23 and 24- closes the circuit over wires 36, 37, 38 and 39 for starting the motor 26, The sotion this motor will rotate the gears 28 29 and the disk 33 until the pin 35 of the dish will engage the pins 32 of the switch, thus operating switch for hrealring the circuits of the electric and the inotor used for running the roachine, as well as the last-mentioned circui which operates the motor 26. ,As all cur. rents at this time are broken, it is obvious that the are light will be cut off and the machine will stop, thus positively preventing the accidental fires caused when films are broken or by the improper operation of the machine.

From the foregoing description it will be seen that a very simple and efiicient means has been provided for automatically stopping the ipicture projecting machine and cutting o the electric are provided the film is broken, while the means for performing this operation is normally retained in a set position for-carrying outthis. function at any time provided the film is broken as above set forth.

Having thus described my invention what is claimed is 1. In a device of the; class described, the combination of a switch, anauxiliary motor, a gear keyed to said auxiliary motor, a secondary gear meshing with said first mentioned gear, a shaft keyed to said last-mentioned gear, a disk keyed-upon said shaft,

' a pin carried by said disk, an electric are circuit connected to' said switch, a picture projecting machine motor circuit connected to said switch, and means for automatically closing a circuit for operating said auxiliary motor provided a filmbecomes broken whereby said disk will be rotated so as to cause the pin thereof to engage the pins'of said switch for operating sald switch for breaking all of said circuits. a v

2. In a device of the. class described, the combination of a housing, a plunger tube carried by said housing, a plunger reciprocally mounted within said tube, means for normally urging said plunger in one direction, a guide rod carrled within said housing, a trip arm slidably mounted upon said in one direction provided a 'fi guide rod, a trip rod supported upon said plunger and bearing against-said trip arm for supporting said trip arm, a contact point carried by said trip arm, a-contact point carried by said housing, means for forming an electric circuit connected to said contact points, said plunger being ada ted to move is broken whereby said trip rodvwill be permitted, to fall thus permitting the trip arm to move downwardly for causing said contact points to engage each other for closing a circuit.

3. In a device of the class described, the combination of an auxiliary motor, a switch, means connecting said motor to said switch for causing said switch to be operated by said motor, a main motor circuit connected to said switch, an electric arc circuit connected to said switch, a housing, a plunger tube carried by said housing, alplunger reciprocally mounted within said tube, a roller carried by one end of said plunger and nor-' mally riding upon a film, a coil spring engaging said plunger for normally urging the same in one direction, a trip arm carried within said housing, means for formin a guide for said trip arm, a trip rod carried upon said plunger and bearing upon said trip arm for normally retaining said trip arm in a setposition, means connected to said auxiliary motor and extending into said housing for forming an electric circuit pro.- vided said plunger moves upon the breaking of a film and the descending of the trip arm whereby said switch will be operated for the breaking of all of said circuits.

In testimony whereof I afiix my signature in the presence of two witnesses.

BALDWIN I-I. FOSTER.

Witnesses: a

G. E. PRITGHARD, J G. Dnncxn. 

